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A blue main sequence star with an unusual spectrum, Achernar has a magnitude of +0.54, making it the brightest of the stars of Eridanus, and the ninth brightest in the entire sky.
Bright Achernar lies at the extreme southern tip of the star-river Eridanus, less than a degree from its southernmost border with neighbouring Hydrus.
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Imagery provided by Aladin sky atlas
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Achernar
Hertzprung-Russell diagram plotting the temperature and luminosity of Achernar (marked by the red circle) relative to other stars.
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